TIPTEL IP 286 Manual page 24

Enterprise IP Phone
Confirm hot key.
2) Press Phone Setting->Lock.
3) Use the navigation key（or press the Switch hot key）to highlight the one you want
to lock.
4) Press Save hot key to save the change, or Back hot key to return to the previous
screen.
5) The icon will be displayed on the top right corner of the idle screen.
6) If you choose LOCK&ANSWER, it will show the icon
interface.
To unlock the phone via Phone interface:
1) Press Menu hot key, you are prompted for the password.
2) Enter the password, and then press Enter hot key, the phone will be unlocked.
3) The icon will be disappearing from the idle screen.
4) If you choose Lock&Answer, you have to enter Menu->Settings->Advanced
Settings, enter the password, and then choose Phone Setting->Lock to disable this
option.
To enable keypad lock via Web interface:
Choose Phone->Preference-> Keyboard Lock to do the relating changes. Please refer to
the instruction above for the parameters' detail.
Customizing Your Phone
and on the user